정상 운전조건 중 반잠수식 플랫폼의 평형 자세에 따른 부유식 해상풍력 시스템의 하중 완화 연구
Load Mitigation on a Floating Offshore Wind System from the Equilibrium Position of a Semi-submersible Platform in Normal Operation Conditions
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Rotor thrust causes the tilt of floating offshore wind systems. Due to wind-induced inclination, not only does the power performance of the wind turbine decrease, but also the load of the floating offshore wind system increases. In this study, to investigate the effects of load mitigation on a floating offshore wind system, the inclination of the floating offshore wind system is straightened by adjusting the amount of ballast water in the floater. The coupled aero-hydro-servo-elastic simulation code FAST is used to perform the load analysis. Then the short-term fatigue damage is calculated using MCrunch based on rainflow counting and Miner’s rule. As a result of dynamic analysis, it was found that the power performance is improved and the bending moment of the tower base is mitigated by ballasting. However, in the case of fatigue load, it was shown that load mitigation is insignificant from the results of DEL.
Abstract
Rotor thrust causes the tilt of floating offshore wind systems. Due to wind-induced inclination, not only does the power performance of the wind turbine decrease, but also the load of the floating offshore wind system increases. In this study, to investigate the effects of load mitigation on a floating offshore wind system, the inclination of the floating offshore wind system is straightened by adjusting the amount of ballast water in the floater. The coupled aero-hydro-servo-elastic simulation code FAST is used to perform the load analysis. Then the short-term fatigue damage is calculated using MCrunch based on rainflow counting and Miner’s rule. As a result of dynamic analysis, it was found that the power performance is improved and the bending moment of the tower base is mitigated by ballasting. However, in the case of fatigue load, it was shown that load mitigation is insignificant from the results of DEL.
참고문헌 (27)
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